“Flying Saucers” originally aired on “Dangerous Assignment” on April 17, 1950. This is one of the shows from the early fifties that had both radio and television versions airing at the same time, and featuring the same cast. The TV series was somewhat obscure, and hard to find. But now, thanks to Hulu, the series can be watched for free. The television series only had a single 39 episode season. Hulu has made all the episodes available. The radio series ran for three years. About 90 episodes have survived. But series star the always reliable Brian Donlevy.